Paperboard package, blank and method and apparatus for producing the same

摘要

A container and corresponding blank from which such container is formed is particularly suitable for packaging liquid products and aseptically packaging liquid foods. The rectangular shaped blank may be formed of a laminated sheet material that preferably includes a composite of paperboard web, aluminum foil and intermediate layers of heat sealable polymer. All blank fold lines are scored and an induction sealing flange area is provided around the entire blank perimeter. A unit of several sheet linked blanks is symmetrically folded about a central axis for juxtaposed alignment of sealing flange areas around the perimeter of the unfolded blank. After induction sealing, the package side flange at the bottom of the unit, the resulting tube pocket is open and charged with a material quantity of liquid. After charging, the series of edge flanges above the first sealed edge flange are also induction sealed and severed from the unit remainder to complete a pillow shaped package. With fluid contents encapsulated, the pillow-shaped package includes a standing flange seam around three of four edges. The pillow corners are collapsed along diagonal corner score lines to triangular gable points and the side and ends of the pillow mechanically erected to orthographic planes with the standing seams and corner gable points folded flat against an adjacent plane.